[antlr-interest] infinite loop in ASTFactory

[Micheal J]

> Hi!
> 
> I noticed a strange behaviour here.. perhaps i'm doing 
> something wrong, 
> but..
> 
> I have a rule like:
> 
> main: e:rule1 a:rule2;
> 
> .. and it works, but if i add some AST construction code:
> 
> main: e:rule1 a:rule2
> {
>      #main = #([MAIN,"main"], e, a);
> }
> ;
> 
> .. then it hangs in infinite loop somewhere in ASTFactory

You should turn off automatic tree construction if you're using building
manually.

Try the following:

1. Auto off (note the "!" after main)

	main!: e:rule1 a:rule2
	{
		#main = #([MAIN,"main"], e, a);
	}
	;

2. Using #main

	main: e:rule1 a:rule2
	{
		#main = #([MAIN,"main"], #main);
	}
	;

Cheers,

Micheal